Move Singleton and related structs to namespace base

chrome/browser/chromeos/extensions/file_manager/event_router_factory.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/extensions/file_manager/event_router_factory.h"
 
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
 #include "chrome/browser/chromeos/extensions/file_manager/event_router.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager_factory.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
 
 namespace file_manager {
 
 // static
 EventRouter* EventRouterFactory::GetForProfile(Profile* profile) {
   return static_cast<EventRouter*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 EventRouterFactory* EventRouterFactory::GetInstance() {
-  return Singleton<EventRouterFactory>::get();
+  return base::Singleton<EventRouterFactory>::get();
 }
 
 EventRouterFactory::EventRouterFactory()
     : BrowserContextKeyedServiceFactory(
           "EventRouter",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(drive::DriveIntegrationServiceFactory::GetInstance());
   DependsOn(
       extensions::ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
   DependsOn(VolumeManagerFactory::GetInstance());
@@ skipping 15 matching lines @@
 
 bool EventRouterFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 bool EventRouterFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace file_manager